Answer:
<h2>0</h2>
Step-by-step explanation:
METHOD 1.
We know:

Therefore

METHOD 2.


exchange x to y and vice versa:

solve for y:
<em> subtract 12 from both sides</em>
<em>divide both sides by 3</em>

replace x in f(x) with the expression

put x = 0 to 

METHOD 3.


Calculate the value of <em>f</em> ⁻¹(x) for x = 0:

Calculate the value of <em>f(x)</em> for x = -4:

Answer: 
Step-by-step explanation:

Once you take off the parenthesis, your sign should change from negative to positive.

The fractions now both have the same denominator. Thus, we can add the numerators.

Therefore, 
345.3
correct me if im wrong
Answer: im pretty sure its 3962.58
Step-by-step explanation
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